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/*
* This file is part of the Distributed Network Block Device 3
*
* Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
*
* This file may be licensed under the terms of of the
* GNU General Public License Version 2 (the ``GPL'').
*
* Software distributed under the License is distributed
* on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
* express or implied. See the GPL for the specific language
* governing rights and limitations.
*
* You should have received a copy of the GPL along with this
* program. If not, go to http://www.gnu.org/licenses/gpl.html
* or write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef TYPES_H_
#define TYPES_H_
#include "config.h"
// ioctl
#define DNBD3_MAGIC 'd'
#define IOCTL_OPEN _IO(0xab, 1)
#define IOCTL_CLOSE _IO(0xab, 2)
#define IOCTL_SWITCH _IO(0xab, 3)
typedef struct
{
char *host;
int vid;
int rid;
int read_ahead_kb;
} dnbd3_ioctl_t;
// network
#define CMD_GET_BLOCK 1
#define CMD_GET_SIZE 2
#define CMD_GET_SERVERS 3
#pragma pack(1)
typedef struct
{
uint16_t cmd; // 2byte
uint16_t vid; // 2byte
uint16_t rid; // 2byte
uint64_t offset; // 8byte
uint64_t size; // 8byte
char handle[8]; // 8byte
} dnbd3_request_t;
#pragma pack(0)
#pragma pack(1)
typedef struct
{
uint16_t cmd; // 2byte
uint16_t vid; // 2byte
uint16_t rid; // 2byte
uint64_t size; // 8byte
char handle[8]; // 8byte
} dnbd3_reply_t;
#pragma pack(0)
#endif /* TYPES_H_ */
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